Re: ALTER TABLE .. < ADD | DROP > OIDS

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От Bruce Momjian
Тема Re: ALTER TABLE .. < ADD | DROP > OIDS
Дата
Msg-id 200212060500.gB650El12702@candle.pha.pa.us
обсуждение исходный текст
Ответ на ALTER TABLE .. < ADD | DROP > OIDS  (Rod Taylor <rbt@rbt.ca>)
Ответы Re: ALTER TABLE .. < ADD | DROP > OIDS  (Bruce Momjian <pgman@candle.pha.pa.us>)
Список pgsql-performance
OK, patch applied and tested.

---------------------------------------------------------------------------

Rod Taylor wrote:
-- Start of PGP signed section.
> I wish to create an alter command which will allow a table to have OIDs
> added or removed.
>
>
> The tricky part appears to be changing the tuples themselves.  I believe
> if I pull the same trick that cluster does (create new file, copy
> tuples, etc) it can be done fairly easily.
>
> First, set up pg_class appropriately (oid flag).
>
> Second, copy out tuples from oldfile to newfile, running a
> heap_deformtuple() -> heap_formtuple() process on each.  Since
> heap_deformtuple only deals with positive numbered attributes
> (non-system attributes) this should be safe to do on a mis-configured
> relation.  heap_formtuple completes the dirty work of setting up the OID
> column appropriately.
>
> --
> Rod Taylor <rbt@rbt.ca>
>
> PGP Key: http://www.rbt.ca/rbtpub.asc
-- End of PGP section, PGP failed!

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